Neat, small project, I really like having the code available! I also don't think you have to beat yourself up over it. I'm new to game development, but have had some programming experience prior - and when you are working solo with a time limit of a week, code tends to get messy. When I started my own game on Sunday, I promised myself I'd keep it more structured this time, but, well, to quote a comment in my code:
"#Oh no, it is a monster of a function, so much code that is redundant and could be handled better argh!"
It's good to acknowledge where one could improve, but don't be too hard on yourself. I actually did have a quick look at the python file, and I found it legible and very much good enough for a quick project like this.
One thing that's quick and easy to do - maybe add install instructions to your game page here, to inform people that don't know how to run a python script on how it's done, and that this needs pygame (I didn't have it installed, but it was of course an easy fix).